Optophysiology: Depth-resolved probing of retinal physiology with functional ultrahigh-resolution optical coherence tomography

Bizheva, K., Pflug, Renate, Hermann, Boris ORCID: https://orcid.org/0000-0001-8658-485X, Považay, Boris, Saltmann, H., Qiu, P., Anger, E., Reitsamer, H., Popov, Sergei, Taylor, J. R., Unterhuber, Angelika ORCID: https://orcid.org/0000-0002-1251-3001, Ahnelt, Peter and Drexler, Wolfgang 2006. Optophysiology: Depth-resolved probing of retinal physiology with functional ultrahigh-resolution optical coherence tomography. Proceedings of the National Academy of Science of the United States of America 103 (13) , pp. 5066-5071. 10.1073/pnas.0506997103

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Abstract

Noncontact, depth-resolved, optical probing of retinal response to visual stimulation with a <10-?m spatial resolution, achieved by using functional ultrahigh-resolution optical coherence tomography (fUHROCT), is demonstrated in isolated rabbit retinas. The method takes advantage of the fact that physiological changes in dark-adapted retinas caused by light stimulation can result in local variation of the tissue reflectivity. fUHROCT scans were acquired from isolated retinas synchronously with electrical recordings before, during, and after light stimulation. Pronounced stimulus-related changes in the retinal reflectivity profile were observed in the inner/outer segments of the photoreceptor layer and the plexiform layers. Control experiments (e.g., dark adaptation vs. light stimulation), pharmacological inhibition of photoreceptor function, and synaptic transmission to the inner retina confirmed that the origin of the observed optical changes is the altered physiological state of the retina evoked by the light stimulus. We have demonstrated that fUHROCT allows for simultaneous, noninvasive probing of both retinal morphology and function, which could significantly improve the early diagnosis of various ophthalmic pathologies and could lead to better understanding of pathogenesis.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Optometry and Vision Sciences
Uncontrolled Keywords:	electroretinogram functional optical coherence tomography inner plexiform layer photoreceptors retinal imaging
ISSN:	00278424
Last Modified:	17 Oct 2022 08:43
URI:	https://orca.cardiff.ac.uk/id/eprint/849

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